10. 8. 0000056689 00000 n Females are about 1/25 of an inch long and have many color forms. H�\��n�@���CDBO+�Hi�J9�n�i���"5��C�~��W��H0l�ov�]�F�������]l�^�kj����lQ��kƯ��ڜ�!�-x��z��c�U�����eL7w�n���g���j���ݽo��.�_��S�G7w��k�h�~�����.��f�����6���'�n��b�_P��[�u���'ͪ�+W�ر�4�����a�c�Q��*��|n��#��!o�[��L~6���m1.�xI^�=ك�,�@����u=�z��S��5X��U�V�Z%j��_"��S�)�x For flower thrips on gladiolus: Mix 1 tablespoon Lysol household cleaner with 1 gallon water. By Susan Jones Many species of thrips feed on orchids; some of the most common include western flower thrips (Frankliniella occidentalis), Cuban laurel thrips (Gynaikothrips ficorum), greenhouse thrips (Heliothrips haemorrhoidalis) and flower thrips (Frankliniella bispinosa). western flower thrips in tomato. In the past 30 years, western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), has become one of the most important agricultural pests worldwide. Thrips (Order: Thysanoptera; Family: Thripidae) Tobacco thrips (Frankliniella fusca (Hinds)) Western flower thrips (Frankliniella occidentalis (Pergande)) Flower thrips (Frankliniella tritici (Fitch)) Melon thrips (Thrips palmi (Karny)) Description: Adult: The adults are tiny insects, generally measuring only 1 to 2 mm in length. Greenhouse producers typically apply pesticides as mixtures to mitigate western flower thrips populations; however, there is limited information available on the compatibility and efficacy of commonly used pesticide mixtures. 0000020084 00000 n This species is a key pest in the greenhouse production of flowers and vegetables. These vary from pale yellow thorax and abdomen to yellow thorax and dark abdomen to very dark color throughout their body. Spray applications are only effective when thrips are actively feeding as larvae or adults. 0000015122 00000 n Figure 1. If there is a very big thrips problem in your area, some plants have resistant varieties. Wings are clear and yellow like those of the female. Adults have feathery wings and vary from yellow to dark brown. It feeds on a number of plants and occasionally damages tree fruit. Larvae are about 1/50 inch long and 1/75 inch wide, translucent white to yellow, and tubular in shape. In early spring, if overwintering sites are disturbed or dry up, thrips migrate to flowering trees and plants and deposit eggs in the tender portions of the host plant, e.g. Western flower thrips feed on lettuce and vector plant viruses. WFT is the most prevalent species of thrips in Massachusetts greenhouses. There are a number of predators and parasites that attack western flower thrip. In early spring, if overwintering sites are disturbed or dry up, thrips migrate to flowering trees and plants and deposit eggs in the tender portions of … Many feed on plant tissues as well as pollen. According to CABI (2014), its current distribution includes: Asia: China, Iran, Japan, Republic of Korea, Kuwait, Malaysia, and Sri Lanka Africa: Algeria, Kenya, Morocco, Reunion, Swaziland, Tunisia, Uganda, and Zimb… 0000021478 00000 n 2.1. Only those biological controls that target the adult female have any chance of reducing damage, and they must respond quickly when adult female thrips first move into the blossoms. Comparison between adult western flower thrips (right) and adult Echinothrips (left). Western flower thrips Frankliniella occidentalis (Thysanoptera: Thripidae) Description: Western flower thrips are slender, very small insects, about 0.03 inch long when mature. Colour varies, from reddish-yellow to mid-dark brown. Western flower thrips, Frankliniella occidentalis P. (Thysanoptera: Thripidae) is a major agricultural and horticulture pest worldwide (Kirk, 2002; Kirk and Terry, 2003).It causes damage and spoilage to a vast number of economically important plant species through feeding, oviposition and spread of several plant diseases, most notably tospoviruses (Morse and Hoddle, 2006). Western flower thrips (WFT) are the most important insect pest of horticultural greenhouse-grown crops worldwide. h�b```b``]�������A���b�,k88��.��|?��P�CC�CNA"+_���؀������= '-��c8����#����+j����a^.��sm���T�x$MB>^a?��c����(V�Q��M�sв�?o=}۶�`�5_9㒚ژ9DV.V�:��z�����|��׶ؤ5.^��o`��ƴ���+--L3��D�- �L��H1 In the 1970s and early 1980s, this species spread throughout North America (Beshear 1983). Female adult western flower thrips live up to 30 days and lay 2-10 eggs per day. Western flower thrips adults are easily carried into glasshouses by wind, as well as on the clothes or in the hair of working personnel, thus making re-infestation from surrounding weeds a constant probability. Western flower thrips may be confused with Frankliniella williamsi (Hood), which primarily infests grasses, especially corn. 0000054512 00000 n 0000002984 00000 n Thrips are a group of tiny, elongated, and fringe-winged insects that are commonly found in flowers of most plants. Western Flower Thrips, Frankliniella occidentalis Frankliniella occidentalis, the western flower thrips, is a key pest of glasshouses, greenhouses and polytunnels.. Thrips can be difficult for growers to detect due to their small size and tendency for hiding within the concealed parts of the plant. However, western flower thrips is regarded to be a 'pesticide-induced problem', having developed resistance to pesticides from different chemical classes. Frankliniella occidentalis– known as Western Flower Thrips or Californian Thrips, is a small insect originating on the West Coast of North America, which spread through much of Europe in the 1980’s as a consequence of the international trade in plants. The female varies from yellow to dark brown, and has a more rounded abdomen. Eggs: Yellowish eggs … A threshold of 10 thrips per bloom is used in California. Adults have 4 feathery wings and vary in color from yellow to dark brown; nymphs are … However, the primary damage caused by WFT is the transmission of Tomato spotted wilt virus (TSWV) to tomato plants. Western flower thrips Frankliniella occidentalis (Thysanoptera: Thripidae) Description: Western flower thrips are slender, very small insects, about 0.03 inch long when mature. Thrips rasp the surface of the fruit as they feed, and their feeding weakens flowers and fruit stems. ), a small black and white-colored bug with piercing-sucking mouthparts, that can kill thrips larvae and adults. They feed by a “punch and suck” method, whereby they push their mouth cone into plant tissue or pollen, and then suck the contents through their straw-like stylets. Frankliniella occidentalis, the western flower thrips, is a representative of the order Thysanoptera. Pear thrips (Taeniothrips inconsequens) Western flower thrips (Frankliniella occidentalis) . Adult western flower thrips can be distinguished from other insects by their fringed wings, their tubular body shape and color. Have dark, hairy, fringes tunnels during the growing season from April! Yellow, orange, brown, or black thrips there are a number of plants and insects continuing to this... By thrips as a vector of TSWV is common in lettuce, capsicum and tomato feed! 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